... nut: 1.Material: SS304 or SS316;carbon steel 2.Surface:polished;galvanized 3.Good price and quality Detailed ... .Material:stainless steel 304 or 316;carbon steel;2.Surface treament: polished,galvanized,hot dipped,nickel plating ... 304 or 316 spring nut;(Size: 1/4",3/8",5/16",1/2",M6,M8,M10,M12);4 ... .Competitive price and good quality;5.OEM service ... ,M12,1/4",3/8",1/2",5/16")